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How to implement classic sorting algorithms in modern C++?
...e going to suffer performance problems everywhere.
– James Kanze
Jul 9 '14 at 13:02
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Great post....
Sample settings.xml for maven
... I've been struggling with it for three days now!
– James Franken
Nov 30 '16 at 20:18
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Here's t...
Git and Mercurial - Compare and Contrast
...es:
This area is one of the main differences between Mercurial and Git, as james woodyatt and Steve Losh said in their answers. Mercurial, by default, uses anonymous lightweight codelines, which in its terminology are called "heads". Git uses lightweight named branches, with injective mapping to ma...
How to find the kth smallest element in the union of two sorted arrays?
This is a homework question. They say it takes O(logN + logM) where N and M are the arrays lengths.
17 Answers
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How do I determine k when using k-means clustering?
I've been studying about k-means clustering , and one thing that's not clear is how you choose the value of k. Is it just a matter of trial and error, or is there more to it?
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Is calculating an MD5 hash less CPU intensive than SHA family functions?
...ond, for a "long" message (this is what you get for messages longer than 8 kB). This is with sphlib, a library of hash function implementations in C (and Java). All implementations are from the same author (me) and were made with comparable efforts at optimizations; thus the speed differences can be...
How to replace a hash key with another key
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hash[:new_key] = hash.delete :old_key
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transform object to array with lodash
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What about if you wanted to preserve the key as a property? (in this example, if the id property did not exist and you wanted to create it based on the key of each object.
– Michael Liquori
Mar 7 '16 at 20:02
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How dangerous is it to compare floating point values?
I know UIKit uses CGFloat because of the resolution independent coordinate system.
11 Answers
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How to elegantly rename all keys in a hash in Ruby? [duplicate]
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ages = { 'Bruce' => 32, 'Clark' => 28 }
mappings = { 'Bruce' => 'Bruce Wayne', 'Clark' => 'Clark Kent' }
ages.transform_keys(&mappings.method(:[]))
#=> { 'Bruce Wayne' => 32, 'Clark Kent' => 28 }
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